You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
402 lines
12 KiB
402 lines
12 KiB
|
|
/* filter_neon_intrinsics.c - NEON optimised filter functions |
|
* |
|
* Copyright (c) 2018 Cosmin Truta |
|
* Copyright (c) 2014,2016 Glenn Randers-Pehrson |
|
* Written by James Yu <james.yu at linaro.org>, October 2013. |
|
* Based on filter_neon.S, written by Mans Rullgard, 2011. |
|
* |
|
* This code is released under the libpng license. |
|
* For conditions of distribution and use, see the disclaimer |
|
* and license in png.h |
|
*/ |
|
|
|
#include "../pngpriv.h" |
|
|
|
#ifdef PNG_READ_SUPPORTED |
|
|
|
/* This code requires -mfpu=neon on the command line: */ |
|
#if PNG_ARM_NEON_IMPLEMENTATION == 1 /* intrinsics code from pngpriv.h */ |
|
|
|
#if defined(_MSC_VER) && !defined(__clang__) && defined(_M_ARM64) |
|
# include <arm64_neon.h> |
|
#else |
|
# include <arm_neon.h> |
|
#endif |
|
|
|
/* libpng row pointers are not necessarily aligned to any particular boundary, |
|
* however this code will only work with appropriate alignment. arm/arm_init.c |
|
* checks for this (and will not compile unless it is done). This code uses |
|
* variants of png_aligncast to avoid compiler warnings. |
|
*/ |
|
#define png_ptr(type,pointer) png_aligncast(type *,pointer) |
|
#define png_ptrc(type,pointer) png_aligncastconst(const type *,pointer) |
|
|
|
/* The following relies on a variable 'temp_pointer' being declared with type |
|
* 'type'. This is written this way just to hide the GCC strict aliasing |
|
* warning; note that the code is safe because there never is an alias between |
|
* the input and output pointers. |
|
* |
|
* When compiling with MSVC ARM64, the png_ldr macro can't be passed directly |
|
* to vst4_lane_u32, because of an internal compiler error inside MSVC. |
|
* To avoid this compiler bug, we use a temporary variable (vdest_val) to store |
|
* the result of png_ldr. |
|
*/ |
|
#define png_ldr(type,pointer)\ |
|
(temp_pointer = png_ptr(type,pointer), *temp_pointer) |
|
|
|
#if PNG_ARM_NEON_OPT > 0 |
|
|
|
void |
|
png_read_filter_row_up_neon(png_row_infop row_info, png_bytep row, |
|
png_const_bytep prev_row) |
|
{ |
|
png_bytep rp = row; |
|
png_bytep rp_stop = row + row_info->rowbytes; |
|
png_const_bytep pp = prev_row; |
|
|
|
png_debug(1, "in png_read_filter_row_up_neon"); |
|
|
|
for (; rp < rp_stop; rp += 16, pp += 16) |
|
{ |
|
uint8x16_t qrp, qpp; |
|
|
|
qrp = vld1q_u8(rp); |
|
qpp = vld1q_u8(pp); |
|
qrp = vaddq_u8(qrp, qpp); |
|
vst1q_u8(rp, qrp); |
|
} |
|
} |
|
|
|
void |
|
png_read_filter_row_sub3_neon(png_row_infop row_info, png_bytep row, |
|
png_const_bytep prev_row) |
|
{ |
|
png_bytep rp = row; |
|
png_bytep rp_stop = row + row_info->rowbytes; |
|
|
|
uint8x16_t vtmp = vld1q_u8(rp); |
|
uint8x8x2_t *vrpt = png_ptr(uint8x8x2_t, &vtmp); |
|
uint8x8x2_t vrp = *vrpt; |
|
|
|
uint8x8x4_t vdest; |
|
vdest.val[3] = vdup_n_u8(0); |
|
|
|
png_debug(1, "in png_read_filter_row_sub3_neon"); |
|
|
|
for (; rp < rp_stop;) |
|
{ |
|
uint8x8_t vtmp1, vtmp2; |
|
uint32x2_t *temp_pointer; |
|
|
|
vtmp1 = vext_u8(vrp.val[0], vrp.val[1], 3); |
|
vdest.val[0] = vadd_u8(vdest.val[3], vrp.val[0]); |
|
vtmp2 = vext_u8(vrp.val[0], vrp.val[1], 6); |
|
vdest.val[1] = vadd_u8(vdest.val[0], vtmp1); |
|
|
|
vtmp1 = vext_u8(vrp.val[1], vrp.val[1], 1); |
|
vdest.val[2] = vadd_u8(vdest.val[1], vtmp2); |
|
vdest.val[3] = vadd_u8(vdest.val[2], vtmp1); |
|
|
|
vtmp = vld1q_u8(rp + 12); |
|
vrpt = png_ptr(uint8x8x2_t, &vtmp); |
|
vrp = *vrpt; |
|
|
|
vst1_lane_u32(png_ptr(uint32_t,rp), png_ldr(uint32x2_t,&vdest.val[0]), 0); |
|
rp += 3; |
|
vst1_lane_u32(png_ptr(uint32_t,rp), png_ldr(uint32x2_t,&vdest.val[1]), 0); |
|
rp += 3; |
|
vst1_lane_u32(png_ptr(uint32_t,rp), png_ldr(uint32x2_t,&vdest.val[2]), 0); |
|
rp += 3; |
|
vst1_lane_u32(png_ptr(uint32_t,rp), png_ldr(uint32x2_t,&vdest.val[3]), 0); |
|
rp += 3; |
|
} |
|
|
|
PNG_UNUSED(prev_row) |
|
} |
|
|
|
void |
|
png_read_filter_row_sub4_neon(png_row_infop row_info, png_bytep row, |
|
png_const_bytep prev_row) |
|
{ |
|
png_bytep rp = row; |
|
png_bytep rp_stop = row + row_info->rowbytes; |
|
|
|
uint8x8x4_t vdest; |
|
vdest.val[3] = vdup_n_u8(0); |
|
|
|
png_debug(1, "in png_read_filter_row_sub4_neon"); |
|
|
|
for (; rp < rp_stop; rp += 16) |
|
{ |
|
uint32x2x4_t vtmp = vld4_u32(png_ptr(uint32_t,rp)); |
|
uint8x8x4_t *vrpt = png_ptr(uint8x8x4_t,&vtmp); |
|
uint8x8x4_t vrp = *vrpt; |
|
uint32x2x4_t *temp_pointer; |
|
uint32x2x4_t vdest_val; |
|
|
|
vdest.val[0] = vadd_u8(vdest.val[3], vrp.val[0]); |
|
vdest.val[1] = vadd_u8(vdest.val[0], vrp.val[1]); |
|
vdest.val[2] = vadd_u8(vdest.val[1], vrp.val[2]); |
|
vdest.val[3] = vadd_u8(vdest.val[2], vrp.val[3]); |
|
|
|
vdest_val = png_ldr(uint32x2x4_t, &vdest); |
|
vst4_lane_u32(png_ptr(uint32_t,rp), vdest_val, 0); |
|
} |
|
|
|
PNG_UNUSED(prev_row) |
|
} |
|
|
|
void |
|
png_read_filter_row_avg3_neon(png_row_infop row_info, png_bytep row, |
|
png_const_bytep prev_row) |
|
{ |
|
png_bytep rp = row; |
|
png_const_bytep pp = prev_row; |
|
png_bytep rp_stop = row + row_info->rowbytes; |
|
|
|
uint8x16_t vtmp; |
|
uint8x8x2_t *vrpt; |
|
uint8x8x2_t vrp; |
|
uint8x8x4_t vdest; |
|
vdest.val[3] = vdup_n_u8(0); |
|
|
|
vtmp = vld1q_u8(rp); |
|
vrpt = png_ptr(uint8x8x2_t,&vtmp); |
|
vrp = *vrpt; |
|
|
|
png_debug(1, "in png_read_filter_row_avg3_neon"); |
|
|
|
for (; rp < rp_stop; pp += 12) |
|
{ |
|
uint8x8_t vtmp1, vtmp2, vtmp3; |
|
|
|
uint8x8x2_t *vppt; |
|
uint8x8x2_t vpp; |
|
|
|
uint32x2_t *temp_pointer; |
|
|
|
vtmp = vld1q_u8(pp); |
|
vppt = png_ptr(uint8x8x2_t,&vtmp); |
|
vpp = *vppt; |
|
|
|
vtmp1 = vext_u8(vrp.val[0], vrp.val[1], 3); |
|
vdest.val[0] = vhadd_u8(vdest.val[3], vpp.val[0]); |
|
vdest.val[0] = vadd_u8(vdest.val[0], vrp.val[0]); |
|
|
|
vtmp2 = vext_u8(vpp.val[0], vpp.val[1], 3); |
|
vtmp3 = vext_u8(vrp.val[0], vrp.val[1], 6); |
|
vdest.val[1] = vhadd_u8(vdest.val[0], vtmp2); |
|
vdest.val[1] = vadd_u8(vdest.val[1], vtmp1); |
|
|
|
vtmp2 = vext_u8(vpp.val[0], vpp.val[1], 6); |
|
vtmp1 = vext_u8(vrp.val[1], vrp.val[1], 1); |
|
|
|
vtmp = vld1q_u8(rp + 12); |
|
vrpt = png_ptr(uint8x8x2_t,&vtmp); |
|
vrp = *vrpt; |
|
|
|
vdest.val[2] = vhadd_u8(vdest.val[1], vtmp2); |
|
vdest.val[2] = vadd_u8(vdest.val[2], vtmp3); |
|
|
|
vtmp2 = vext_u8(vpp.val[1], vpp.val[1], 1); |
|
|
|
vdest.val[3] = vhadd_u8(vdest.val[2], vtmp2); |
|
vdest.val[3] = vadd_u8(vdest.val[3], vtmp1); |
|
|
|
vst1_lane_u32(png_ptr(uint32_t,rp), png_ldr(uint32x2_t,&vdest.val[0]), 0); |
|
rp += 3; |
|
vst1_lane_u32(png_ptr(uint32_t,rp), png_ldr(uint32x2_t,&vdest.val[1]), 0); |
|
rp += 3; |
|
vst1_lane_u32(png_ptr(uint32_t,rp), png_ldr(uint32x2_t,&vdest.val[2]), 0); |
|
rp += 3; |
|
vst1_lane_u32(png_ptr(uint32_t,rp), png_ldr(uint32x2_t,&vdest.val[3]), 0); |
|
rp += 3; |
|
} |
|
} |
|
|
|
void |
|
png_read_filter_row_avg4_neon(png_row_infop row_info, png_bytep row, |
|
png_const_bytep prev_row) |
|
{ |
|
png_bytep rp = row; |
|
png_bytep rp_stop = row + row_info->rowbytes; |
|
png_const_bytep pp = prev_row; |
|
|
|
uint8x8x4_t vdest; |
|
vdest.val[3] = vdup_n_u8(0); |
|
|
|
png_debug(1, "in png_read_filter_row_avg4_neon"); |
|
|
|
for (; rp < rp_stop; rp += 16, pp += 16) |
|
{ |
|
uint32x2x4_t vtmp; |
|
uint8x8x4_t *vrpt, *vppt; |
|
uint8x8x4_t vrp, vpp; |
|
uint32x2x4_t *temp_pointer; |
|
uint32x2x4_t vdest_val; |
|
|
|
vtmp = vld4_u32(png_ptr(uint32_t,rp)); |
|
vrpt = png_ptr(uint8x8x4_t,&vtmp); |
|
vrp = *vrpt; |
|
vtmp = vld4_u32(png_ptrc(uint32_t,pp)); |
|
vppt = png_ptr(uint8x8x4_t,&vtmp); |
|
vpp = *vppt; |
|
|
|
vdest.val[0] = vhadd_u8(vdest.val[3], vpp.val[0]); |
|
vdest.val[0] = vadd_u8(vdest.val[0], vrp.val[0]); |
|
vdest.val[1] = vhadd_u8(vdest.val[0], vpp.val[1]); |
|
vdest.val[1] = vadd_u8(vdest.val[1], vrp.val[1]); |
|
vdest.val[2] = vhadd_u8(vdest.val[1], vpp.val[2]); |
|
vdest.val[2] = vadd_u8(vdest.val[2], vrp.val[2]); |
|
vdest.val[3] = vhadd_u8(vdest.val[2], vpp.val[3]); |
|
vdest.val[3] = vadd_u8(vdest.val[3], vrp.val[3]); |
|
|
|
vdest_val = png_ldr(uint32x2x4_t, &vdest); |
|
vst4_lane_u32(png_ptr(uint32_t,rp), vdest_val, 0); |
|
} |
|
} |
|
|
|
static uint8x8_t |
|
paeth(uint8x8_t a, uint8x8_t b, uint8x8_t c) |
|
{ |
|
uint8x8_t d, e; |
|
uint16x8_t p1, pa, pb, pc; |
|
|
|
p1 = vaddl_u8(a, b); /* a + b */ |
|
pc = vaddl_u8(c, c); /* c * 2 */ |
|
pa = vabdl_u8(b, c); /* pa */ |
|
pb = vabdl_u8(a, c); /* pb */ |
|
pc = vabdq_u16(p1, pc); /* pc */ |
|
|
|
p1 = vcleq_u16(pa, pb); /* pa <= pb */ |
|
pa = vcleq_u16(pa, pc); /* pa <= pc */ |
|
pb = vcleq_u16(pb, pc); /* pb <= pc */ |
|
|
|
p1 = vandq_u16(p1, pa); /* pa <= pb && pa <= pc */ |
|
|
|
d = vmovn_u16(pb); |
|
e = vmovn_u16(p1); |
|
|
|
d = vbsl_u8(d, b, c); |
|
e = vbsl_u8(e, a, d); |
|
|
|
return e; |
|
} |
|
|
|
void |
|
png_read_filter_row_paeth3_neon(png_row_infop row_info, png_bytep row, |
|
png_const_bytep prev_row) |
|
{ |
|
png_bytep rp = row; |
|
png_const_bytep pp = prev_row; |
|
png_bytep rp_stop = row + row_info->rowbytes; |
|
|
|
uint8x16_t vtmp; |
|
uint8x8x2_t *vrpt; |
|
uint8x8x2_t vrp; |
|
uint8x8_t vlast = vdup_n_u8(0); |
|
uint8x8x4_t vdest; |
|
vdest.val[3] = vdup_n_u8(0); |
|
|
|
vtmp = vld1q_u8(rp); |
|
vrpt = png_ptr(uint8x8x2_t,&vtmp); |
|
vrp = *vrpt; |
|
|
|
png_debug(1, "in png_read_filter_row_paeth3_neon"); |
|
|
|
for (; rp < rp_stop; pp += 12) |
|
{ |
|
uint8x8x2_t *vppt; |
|
uint8x8x2_t vpp; |
|
uint8x8_t vtmp1, vtmp2, vtmp3; |
|
uint32x2_t *temp_pointer; |
|
|
|
vtmp = vld1q_u8(pp); |
|
vppt = png_ptr(uint8x8x2_t,&vtmp); |
|
vpp = *vppt; |
|
|
|
vdest.val[0] = paeth(vdest.val[3], vpp.val[0], vlast); |
|
vdest.val[0] = vadd_u8(vdest.val[0], vrp.val[0]); |
|
|
|
vtmp1 = vext_u8(vrp.val[0], vrp.val[1], 3); |
|
vtmp2 = vext_u8(vpp.val[0], vpp.val[1], 3); |
|
vdest.val[1] = paeth(vdest.val[0], vtmp2, vpp.val[0]); |
|
vdest.val[1] = vadd_u8(vdest.val[1], vtmp1); |
|
|
|
vtmp1 = vext_u8(vrp.val[0], vrp.val[1], 6); |
|
vtmp3 = vext_u8(vpp.val[0], vpp.val[1], 6); |
|
vdest.val[2] = paeth(vdest.val[1], vtmp3, vtmp2); |
|
vdest.val[2] = vadd_u8(vdest.val[2], vtmp1); |
|
|
|
vtmp1 = vext_u8(vrp.val[1], vrp.val[1], 1); |
|
vtmp2 = vext_u8(vpp.val[1], vpp.val[1], 1); |
|
|
|
vtmp = vld1q_u8(rp + 12); |
|
vrpt = png_ptr(uint8x8x2_t,&vtmp); |
|
vrp = *vrpt; |
|
|
|
vdest.val[3] = paeth(vdest.val[2], vtmp2, vtmp3); |
|
vdest.val[3] = vadd_u8(vdest.val[3], vtmp1); |
|
|
|
vlast = vtmp2; |
|
|
|
vst1_lane_u32(png_ptr(uint32_t,rp), png_ldr(uint32x2_t,&vdest.val[0]), 0); |
|
rp += 3; |
|
vst1_lane_u32(png_ptr(uint32_t,rp), png_ldr(uint32x2_t,&vdest.val[1]), 0); |
|
rp += 3; |
|
vst1_lane_u32(png_ptr(uint32_t,rp), png_ldr(uint32x2_t,&vdest.val[2]), 0); |
|
rp += 3; |
|
vst1_lane_u32(png_ptr(uint32_t,rp), png_ldr(uint32x2_t,&vdest.val[3]), 0); |
|
rp += 3; |
|
} |
|
} |
|
|
|
void |
|
png_read_filter_row_paeth4_neon(png_row_infop row_info, png_bytep row, |
|
png_const_bytep prev_row) |
|
{ |
|
png_bytep rp = row; |
|
png_bytep rp_stop = row + row_info->rowbytes; |
|
png_const_bytep pp = prev_row; |
|
|
|
uint8x8_t vlast = vdup_n_u8(0); |
|
uint8x8x4_t vdest; |
|
vdest.val[3] = vdup_n_u8(0); |
|
|
|
png_debug(1, "in png_read_filter_row_paeth4_neon"); |
|
|
|
for (; rp < rp_stop; rp += 16, pp += 16) |
|
{ |
|
uint32x2x4_t vtmp; |
|
uint8x8x4_t *vrpt, *vppt; |
|
uint8x8x4_t vrp, vpp; |
|
uint32x2x4_t *temp_pointer; |
|
uint32x2x4_t vdest_val; |
|
|
|
vtmp = vld4_u32(png_ptr(uint32_t,rp)); |
|
vrpt = png_ptr(uint8x8x4_t,&vtmp); |
|
vrp = *vrpt; |
|
vtmp = vld4_u32(png_ptrc(uint32_t,pp)); |
|
vppt = png_ptr(uint8x8x4_t,&vtmp); |
|
vpp = *vppt; |
|
|
|
vdest.val[0] = paeth(vdest.val[3], vpp.val[0], vlast); |
|
vdest.val[0] = vadd_u8(vdest.val[0], vrp.val[0]); |
|
vdest.val[1] = paeth(vdest.val[0], vpp.val[1], vpp.val[0]); |
|
vdest.val[1] = vadd_u8(vdest.val[1], vrp.val[1]); |
|
vdest.val[2] = paeth(vdest.val[1], vpp.val[2], vpp.val[1]); |
|
vdest.val[2] = vadd_u8(vdest.val[2], vrp.val[2]); |
|
vdest.val[3] = paeth(vdest.val[2], vpp.val[3], vpp.val[2]); |
|
vdest.val[3] = vadd_u8(vdest.val[3], vrp.val[3]); |
|
|
|
vlast = vpp.val[3]; |
|
|
|
vdest_val = png_ldr(uint32x2x4_t, &vdest); |
|
vst4_lane_u32(png_ptr(uint32_t,rp), vdest_val, 0); |
|
} |
|
} |
|
|
|
#endif /* PNG_ARM_NEON_OPT > 0 */ |
|
#endif /* PNG_ARM_NEON_IMPLEMENTATION == 1 (intrinsics) */ |
|
#endif /* READ */
|
|
|